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How To Connect Multiple Flare Tips On Aspen Flare System Analyzer

flare design flare flarenet afsa aspen flare system analyze 2 flare connected flare.

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#1 Emamoke

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Posted 17 January 2019 - 02:53 AM

Good day, 

 

I am designing a Flare System, and I would like help on how to model the flare system with multiple flares tips connected using Aspen Flare System Analyzer. 

 

I have to design Flare system where multiple flares tips are connected downstream the KOD. 

 

How do i split the flow to multiple flare tips (4 Nos).

 

Is this possible with Aspen Flare System Analyzer, or is there a software that handles this simulation.  

 

I tried using the TEE but this does not seem to work. 

 

 

Thanks a lot 

Emamoke 

 

 

 

 

 



#2 AlertO

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Posted 30 January 2019 - 08:57 PM

Hi Emamoke

 

Flare System Analyzer aim to determine the pressure profile in the system while don't care what type of flare tip you use. Although your actual flare tip has 4 nozzles, you may consider it as one device and don't care about the flow distribution to each nozzle. The key parameter you need to focus is only the pressure drop across the tip vs the total relief flow (through 4 nozzles) and then input them into the program by using only one flare tip connected to the flare stack.

 

Hope this may help you.



#3 Emamoke

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Posted 05 February 2019 - 07:35 AM

Hi Emamoke

 

Flare System Analyzer aim to determine the pressure profile in the system while don't care what type of flare tip you use. Although your actual flare tip has 4 nozzles, you may consider it as one device and don't care about the flow distribution to each nozzle. The key parameter you need to focus is only the pressure drop across the tip vs the total relief flow (through 4 nozzles) and then input them into the program by using only one flare tip connected to the flare stack.

 

Hope this may help you.

 

 

Thank You For your reply 

 

What I mean 4 FLare Stack, not 4 flare nozzles. 

 

I have attached a Screen shot of what i want. 

 

I Highlighted the flow at each tee, for the 18" line, and 20" line. It doesnt seem to tally because, i expected more flow in the 20" line. 

Attached Files


Edited by Emamoke, 05 February 2019 - 07:37 AM.


#4 PRVBoss

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Posted 05 February 2019 - 03:15 PM

Despite the larger flow area, there appears to be quite a bit more resistance downstream of the 20 inch branch. It doesn't look too surprising to me.



#5 AlertO

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Posted 05 February 2019 - 08:21 PM

Emamoke

 

The high pressure drop across 20" pipe (Pipe31) is the reason you don't get the flow that you expect. One more point, there is something strange on connector6 which reduce the pressure of Pipe44 to be less than Pipe28.

 

I just wonder about the bottleneck (18") in this flare network. if there is any reason behind the scene because I have never seen this kind of reduced pipe connected in between the flare header.



#6 Emamoke

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Posted 07 February 2019 - 04:03 AM

Despite the larger flow area, there appears to be quite a bit more resistance downstream of the 20 inch branch. It doesn't look too surprising to me.

 

That True, I wasnt expecting such. Any idea why this happens



#7 Emamoke

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Posted 07 February 2019 - 04:09 AM

Emamoke

 

The high pressure drop across 20" pipe (Pipe31) is the reason you don't get the flow that you expect. One more point, there is something strange on connector6 which reduce the pressure of Pipe44 to be less than Pipe28.

 

I just wonder about the bottleneck (18") in this flare network. if there is any reason behind the scene because I have never seen this kind of reduced pipe connected in between the flare header.

 

The Reason why the network is such is because, 20" is an exisiting Flare. Infact, all the FLares are already existing. 

The plan is to tie the new KOD to the existing flare. 

Flare tip 2,3,4,5 are close to each other (and have the same header), while Flare tip 1 is far in the opposite direction (on a different header). 

 

I have attached a revised drawing for this. This looks better 

Attached Files


Edited by Emamoke, 07 February 2019 - 04:14 AM.





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